a convex lens is said to have a real focus and a concave lens a Virtual Focus. why?
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Virtual means when the image if formed behind the mirror
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Dear mate..
Because real images are images that can be caught on screen . Convex Lens always produce images that can be caught in a screen except one case , when the object is kept at focus F1 and optical centre O .
Virtual images are images that cannot be caught on a screen . These images are produced by concave lens in all cases. ie ,they are found behind the lens.
Hope its helps u... Please mark it as brainliest.
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